The Release Cycle

This document explains the release cycle of the Sylius project (i.e. the code & documentation hosted on the main Sylius/Sylius Git repository).

Sylius manages its releases through a time-based model and follows the Semantic Versioning strategy:

  • A new Sylius minor version (e.g. 1.1, 1.2, etc.) comes out at least every four months.
  • A new Sylius patch version (e.g. 1.0.1, 1.0.2, etc.) comes out at least every three weeks.

New Sylius minor releases will drop unsupported PHP versions.


The full development period for any minor version is divided into two phases:

  • Development: First 5/6 of the time intended for the release to add new features and to enhance existing ones.
  • Stabilization: Last 1/6 of the time intended for the release to fix bugs, prepare the release, and wait for the whole Sylius ecosystem (third-party libraries, plugins, and projects using Sylius) to catch up.

During both periods, any new feature can be reverted if it won’t be finished in time or won’t be stable enough to be included in the coming release.


Each minor Sylius version is maintained for a fixed period of time after its release. This maintenance is divided into:

  • Bug fixes and security fixes: During this period, being eight months long, all issues can be fixed. The end of this period is referenced as being the end of maintenance of a release.
  • Security fixes only: During this period, being sixteen months long, only security related issues can be fixed. The end of this period is referenced as being the end of life of a release.

Past Releases

Version Release date End of maintenance End of life Status
1.0 Sep 13, 2017 May 13, 2018 Jan 13, 2019 Not supported
1.1 Feb 12, 2018 Oct 12, 2018 Jun 12, 2019 Not supported
1.2 Jun 13, 2018 Feb 13, 2019 Oct 13, 2019 Not supported
1.3 Oct 1, 2018 Jun 1, 2019 Feb 1, 2020 Not supported
1.4 Feb 4, 2019 Oct 4, 2019 Jun 4, 2020 Not supported
1.5 May 10, 2019 Jan 10, 2020 Sep 10, 2020 Not supported
1.6 Aug 29, 2019 Apr 29, 2020 Dec 29, 2020 Security support only
1.7 Mar 2, 2020 Nov 16, 2020 Jul 16, 2021 Fully supported
1.8 Sep 14, 2020 May 14, 2021 Jan 14, 2022 Fully supported

Future Releases

Version Development starts Stabilization starts Release date
1.9 Sep 14, 2020 Mid December 2020 Late January 2021

Backward Compatibility

All Sylius releases have to comply with our Backward Compatibility Promise.

Whenever keeping backward compatibility is not possible, the feature, the enhancement or the bug fix will be scheduled for the next major version.